Patent · US Active

Disentangled high or ultrahigh molecular weight polyethylene prepared with Ziegler-Natta catalyst

US9676877B2 · kind B2 · utility

2Cited by

6References

20Claims

0Family size

Assignee

Borealis AG · AT

Inventors

Thomas Hjertberg · Kungshamn, SE
Alexandra Romina Albunia · Linz, AT
Yi Liu · Linz, AT
Qizheng Dou · Linz, DE

Key dates

Filing date	Feb 6, 2015
Grant date	Jun 13, 2017
Priority date	—
Expiry date	Feb 6, 2035

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L2314/02
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Disentangled high or ultrahigh molecular weight polyethylene ((U)HMWPE) being produced with a Ziegler-Natta catalyst, characterized by (i) a factor for the normalized elastic modulus G′0/G′P of less than 0.95 determined in a dynamic time sweep measurement at 180° C. with constant strain of 0.5% at fixed frequency of 10 rad/s for at least 3600 s, whereby G′0 is the elastic shear modulus measured at t0 directly after melting the sample and G′p is the maximum plateau modulus.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.